Subject:
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Re: Struggling with encoder wheel
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 12 Apr 2001 21:54:37 GMT
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Original-From:
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Simon Bogaert <Simon.Bogaert@advalvas.=nospam=be>
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Viewed:
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1063 times
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Hello,
> light sensor wheel. But I'm not sure how to build small round things
> out of Lego that have 36 divisions at even points around them. I
> thought about using a cardboard disk, but I decided it would bend too
> easily after just a little use and the touch sensors wouldn't detect
> it correctly.
What is Lego made out of? ==> ABS plastic
What can you buy in sheets with the same thickness as Lego? ==> ABS plastic
So what I would do if I were you is go to a modelbuilder's supplier and ask
for a sheet of ABS of 1.5 (?) mm thick. It's great to build containers of,
or just make circles of plastic. Dividing the wheel in 36 sectors can't be
that hard; you can apply the colors with felt-tip alcohol pencils if you can
manage to find white ABS (mine is grey). To position the wheel correctly,
you can cut out notches at the edge, so that a touch sensor can record the
correct position of the wheel and a rotation sensor couldroughly teel you
where you are.
Hope This Helps
Simon
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Message is in Reply To:
 | | Re: Struggling with encoder wheel
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| (...) I thought about something like that, but using 2 wheels and 2 touch sensors, not just one, and using my 2 bit encoding system like on the light sensor wheel. But I'm not sure how to build small round things out of Lego that have 36 divisions (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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